Island



-May 1. 1928.

F. A. STEVENS ET AL OPHTHALMIC MOUNTING AND METHOD Filed JulyB, 1922ljiomgyk Patented May l,

hliTED STATtZ M he.

seer

FREDERICK A. STEVENS AND JAMES W. WELSH, OF PROVIDENCE, RHODE ISLAND,AS-

SIGNORS, MESNE ASSIGNMENTS, TO BAUSGE AND LOMB OPTICAL COMPANY, OFROCHESTER, NEW YORK, A CORPORATION 013 NEVJ YORK.

OPIITHALMIC MOUNTING AND METHOD Application filed July 8, 1922. SerialNo. 573,656.

The present invention relates to ophthalmic mountings and methods ofmaking the,

same.

The chief object of the invention to improve upon present-day methods ofmanufacturing'endless non-metallic lens rims.

Other objects will appear hereinafter.

In the accompanying drawings, Fig. 1 is a view of a lens rim constructedaccording to a preferred embodiment of. the present invention; Fig.2 isa detail of the same, partly in section; Figs. 4-, 5 and 6 are sim lardetails of modifications: Fin. 7 is a section taken upon the line Z'? ofFig. 6;

Figs. 8, 9 and 10 are views similar to Fig. 2

of further modifications; and Fig. 11 is a section taken upon the line111.1 of Fig. 10,

It has been the practice hitherto to manufacture endless lens rims ofnon-metallic material, like zylonite and the like, by dieing them out ofsheet stock. This practice involves great waste, for the portions of thestock between the rims, and the circular disks cut from the centers ofthe rims, are

scrapped.

There is hardly any waste involved in the use of the present invention.Not sheet stock, but preferably cylindrical rods of the non-metallicmaterial are employed. There is a further saving in labor and materialsthus effected in that it is not necessary to smooth or round ofi theedges of the rims, as is the case with died-out stock. The rod is bentinto the form of a ring 2, as shown in Fig. 1, and the ends 4 and 6 ofthe bent rod are joined together to form a continuous ring. The innerface of the ring is then grooved at 8 to provide the thus completed rimwith a lens seat, or the rod may be initially grooved to'start with,before it is bent into, the ring form.

According to the preferred form of the present invention, shown in Figs.1 and 2. the ends 4 and 6 of the rod are reduced in cross section at 10and 12. the reduced ends are inserted into recesses 14 and 16 of anonmetallic ferrule 18, and the reduced ends are then cemented to thewalls of the recesses. The ferrule 18 may convenientlv be made from ashort non-metallic rod of the same substance and cross-sectionaldiameter as the rod 2, though of smaller length. the recesses 14 and 16being shaped to correspond to the shape of the reduced ends 10 and 12.In the drawings, the shape is shown as conical. Of course, the ferrule18 is bent to conform to the circumference of the completed rim. A rimso constructed has all the attributes of presentday rims of thischaracter, except that it is very much cheaper.

The relative dimensions of the rods 2 and 18 may be reversed, as shownin Fig. 3. In this figure, the ends of the rod 18 are reduced in crosssection, and these reduced ends fit into correspondingly shaped recessesprovided in. the ends of the rod 2.

The rims shown in Figs. 1, 2 and 3 are composed of two rods 2 and 1-8. Acontinuous rim may, however, be made from a single rod by recessing oneend of the rod at 20, Fig. 4; reducing the cross section of the otherend, as shown at 22, inserting the reduced end 22 in the recess 20, andcementing the reduced end to the walls of the recess. i

The ferrule 18, Figs. 1 and 2, need not necessarily be of the samediameter as the rod 2. In Fig. 5 is shown a. constructionin which theferrule 24 is of larger cross sec:

tion. In that event, it will not be necessary to reduce the crosssection of the ends 4 and 6 of the bent rod 2. The ends a and 6 may beinserted into cylindrical recesses 26 and 28 and suitably cemented inplace.

The non-metallic rimsare, of'course, intended to be secured to a nosebridge or to be pivoted to spectacle temples, or both. This isordinarily effected by means of metal clamps that are secured to theends of the bridge or to which the temples are pivoted. The clamps willnaturally be positioned so as to clamp the joined-together ends of thering. thus hiding the joints at the ends of the bent rod 2. Such a clampmay, furthermore, if suitably constructed, itself act as the medium forjoining the ends of the bent rod 2 together. One such construction isillustrated in Figs. 6 and 7. In these figures, the ends 1 and 6 of thebent rod 2 are simply juxtaposed together, thougha layer of cement may,if desired, be placed at the dividing line between the ends t and 6. Theends t and 6 of the ring are provided with transverse corrugations 80,and the clamp 82 is similarly provided with trans versecorrugationsv34j, the corrugations provided upon the rod 2 to hold theparts together. Of course, the corrugations 30 might be provided uponthe ferrule 18 or the ferrule 24:-

Other methods of joining the ends of the ring 2 together wit-h the aidof metal are illustrated in Figs. 8 to 11. According to the constructionof Fig. 8,'thc ends 4; and (i of the rod 2 are provided with transverserecesses 36 and 38, and alincd longitudinal recesses l0 and 4:2. Theends of a metal strip 44 are inserted through the transverse recesses 36and 38 until the body of the strip becomes seated in the alinedlongitudinal recesses 40 and 42, and the tips 46 and 48 of the strip areclinched. over against the rod 2, as shown.

A very effective construction is shown in Figs. 9 to 11. The ends of therod 2 are provided with alined longitudinal, transversely corrugatedrecesses 50 and These recesses may be on the outer face of the rim, Fig.9, or the inner face, Figs. 10 and 11. A transversely corrugated metalclamp 56 is inserted into the alined recesses 50 and 52 to hold the endsof the rod together. The corrugations dovetail into one another in thesame manner as described above in connection with the description ofFig. 6.

Many other modifications will occur to persons skilled in the art, andall such are intended to be embraced within the spirit and scope of theappended claims.

What is claimed as new is:

1. The method of making an article of the class described that comprisesbending a zylonite rod into the form of a ring, inserting the ends ofthe rod in a zylonite ferrule, and cementing the ends of the rod to theferrule to form a continuous ring.

2. The method of making an ophthalmic mounting that comprises bending anonmetallic rod into the form of a ring, insertsaid end may enter therecess .in the firstnamed rod, inserting the reduced end in the recess,and integrally uniting the reduced" end to the walls of the recess.

4-. The method of making an ophthalmic mounting that comprises recessingtheends of a short non-metallic rod, bending a second nonanetallic rodof diameter equal to the diameter of the first-nan1ed rod into the formof a ring, reducing the cross section of the ends of the second rod sothat they may enter the recesses in the tirst-nan'ied rod, inserting thereduced ends in. the recesses, cementing the reduced ends to the wallsof the recesses to form a continuous ring, and grooving the inner faceof the ring to provide it with a lens seat.

5. An ophthalmic mounting comprising a non-metallic rod bent into theform of a ring, the ends of the rod being inserted in anon-metallicferrule and cemented to the ferrule to form a continuous ring, then'iounting being provided with a lens-receiving groove. 7

6. The method of making an ophthalmic mounting that comprises bending azylonite member into the form of a ring, joining the ends of the membertogether with cement so as to form a continuous ring, and providing theinner face of the ring with a lens seat.

In testimony whereof, we have hereunto subscribed our names this 6th dayof July,

FREDERICK A. STEVENS. JAMES V. lVELSH.

